Of course my question is based on some experiences that occur in the market.
My observations of crypto market conditions, such as there are groups or people who do things that cause the price of other coins to only last for a moment.
Please have a discussion that makes all participants gain new knowledge.
To the best of my understanding and experience, the answer is yes, but this comes with a big condition, the condition is, you must be holding or investing in coins that will make you stand a chance of getting a good reward in the future or getting the guarantee as you called it.
Let me start with coins like ETH, BNB, and ADA, these coins have been around for years, now assuming someone invested in them since two years ago, by today or this year, the person would be reaping a very good reward, because these coins are very good.
On the other hand, assuming someone invested in most shitcoins as of two or three years ago, of which many are dead already, the person would be in losses now. Therefore you can see that, it is very important for someone to first carry out his due diligence before investing in any coin, this will go a long way in directing the person, even if the person is in doubt, there a good number of coins at least within top 50 in coinmarketcap that are good for long term.